Transparency issue in PNG image in IE6

[jspodisus]

Hi

Im new to CSS. I encountered a problem in IE6.I have this code in my IE6.css :.download-bg {

background:none;filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../images/background/popupBg.png', sizingMethod='scale');

}

 

But its commented out for rectification of some other issue using flash file. But popupBg.png when opened for the download button gives a shadow which it should not. How shoul i go about it